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ertMPE10 105(A): ADVANCED METROLOGY
Teaching scheme: 3 hours lecture and 1 hour tutorial per week Credits: 4
Objectives: To understand the working principles and operations of various measuring devices and its calibration.
Module - I (16 hours)
Elements of measurement, Statistical analysis of measurement results, Errors and uncertainties in measurement - computation of uncertainty in inputs and outputs. End, Line and wave length Standards of length, Airy & Bessel points, desirable features of end standards, calibration of end standards by interferometry - NPL Gauge length interferometer, calibration of line standard by micrometer microscope, Photoelectric microscope and moir fringe technique, measurement of large displacements using lasers, photoelectric autocollimator, Types of interchange
Module – II (15 hours)
Limit Gauges: Taylor's principles of gauge design, limitations of ring & plug gauges, position and receiver gauges, types of limit gauges. Comparators: Multirange sigma comparator, optotest comparator, Eden-Rolt millionth comparator, Back pressure and free flow type pneumatic comparators, Differential back pressure gauge, Non contact and contact type pneumatic gauging elements, Air gauging with electronic sensors, Pre-process, in-process & post process gauging, Automatic inspection.
Module - III (14 hours)
Calibration: Calibration of Working Standards by Interferrometry, Application of interferometry, calibration of gauges by interference method, the gauge length interferometer, obliquity correction, the absolute length gauge interferometer. The Calibration of working standards by direct comparison in series: Different types of comparators such as the pneumatic, optical, electrical and electronic comparators, principle of amplification, magnification, sensitivity and response, the calibrations of end gauges in sets, ruling and calibration of standard scales.
Module-IV (15 hours)
Measuring Machines: Floating carriage diameter
Teaching scheme: 3 hours lecture and 1 hour tutorial per week Credits: 4
Objectives: To understand the working principles and operations of various measuring devices and its calibration.
Module - I (16 hours)
Elements of measurement, Statistical analysis of measurement results, Errors and uncertainties in measurement - computation of uncertainty in inputs and outputs. End, Line and wave length Standards of length, Airy & Bessel points, desirable features of end standards, calibration of end standards by interferometry - NPL Gauge length interferometer, calibration of line standard by micrometer microscope, Photoelectric microscope and moir fringe technique, measurement of large displacements using lasers, photoelectric autocollimator, Types of interchange
Module – II (15 hours)
Limit Gauges: Taylor's principles of gauge design, limitations of ring & plug gauges, position and receiver gauges, types of limit gauges. Comparators: Multirange sigma comparator, optotest comparator, Eden-Rolt millionth comparator, Back pressure and free flow type pneumatic comparators, Differential back pressure gauge, Non contact and contact type pneumatic gauging elements, Air gauging with electronic sensors, Pre-process, in-process & post process gauging, Automatic inspection.
Module - III (14 hours)
Calibration: Calibration of Working Standards by Interferrometry, Application of interferometry, calibration of gauges by interference method, the gauge length interferometer, obliquity correction, the absolute length gauge interferometer. The Calibration of working standards by direct comparison in series: Different types of comparators such as the pneumatic, optical, electrical and electronic comparators, principle of amplification, magnification, sensitivity and response, the calibrations of end gauges in sets, ruling and calibration of standard scales.
Module-IV (15 hours)
Measuring Machines: Floating carriage diameter